Kiln.



C. A. MATGHAM.

KILN.

APPLICATION FILED AUG. 22,1906.

Patented Nov. 2, 1909.

L--faf Il i OQ llmlmnmnd ulllulunlllllullmmw` To all whom it 'mis/g; concern:

i di Elin@ @FFE Y .TCAI, ALLENTQTNN, PENNSYLVANIA, ASSIGNGR TO FULLER GGi-Pl/flli :5, 0F OATflS'UQUl-l, PENNSYLVANIA, .A CORPORATION OF n W .l ,i nuestras-f,

Be it known that l, CHARLES A. MATCHAM, a citizen ot the nited States, residing in Allentown, lbennsylvania, have invented certain improvements in Kilns, or which the following is a specication.

@ne object ot my intention is to so combine three or more rotary cement kilns as to secure an increased production of clinker at less cost than has hitherto heen possible; it being further desired that the arrangement and construction of the parts he such "hat the inost complete combustion of fuel is insured, whether such fuel he gas, oil or powdered carhonaceous material. These objects l attain as hereinafter set forth, reference heilig had to the accompanying drawings, in which:

Figure l, is a vertical cement. kiln ctional view of a iznf'enti f, is a plan, par" y in section, ot rated in Fig. l; Fig.

s :i cw on the line and liig. 4, is a transverse secthe line 4 4-, Fig. l.

own to those skilled in the art, it sable in the burning oi cement clinker cure thorough combustion of the fuel l as high a 'tl-:inperature as possible from such. combustion, ln burning Cement i' iukcr according to the present practice u relatively high temperature and in 1y instances while still containing conii 'ole matter, and it is to insure complete combustion, as well as to take advantage of all ot the heat contained in the oroducts of combustion, that my invention is particularly devised. rthe arrangement of partsis such, ioreoven that the device as a whole may he operated at a higher speed.

ln the above drawings, is a rotary kiln or the generalconstruction well known in this art, into the front end of which fuel is introduced from a burner a. This kiln may he of any length, though in the particular case Ataken for illustration it is thirty to forty :toet long. lts rear end projects into or communicates with the `lower portion of a hrick hood B and is suitably rotated hy mechanism indicated at a; the kiln being, as usual, supported on roller hearings a?. The brick hood has, extending into the upper portion of the side opposite that with which the kiln A communicates, two other loustructcd according to myv ar reduc/ts of conihustion pass into a stack Patented Nov., 2, 19039.,

Serial No. 33L595.

rotary kilns C and C' in the present instance and is provided with an apron o having an inclined door for the reception ot cementitions material discharged from t-he kilns C and C and a spout' or conduit- Z/ leading from said apron to the upper end of the kiln A. Said hood has also any desired nunihci" of openings b2 for the admission of air, which may he of any size suited to the work at hand and may loe placed in any desider positions, in the present instance at each side oi' the kiln A, which will be hercatter referred to as the main kiln.

The two kilns C and Clare preferably of a diameter less than that of the kiln A and while they may he of any red length, in the presentinstance, are approximately double the length of said niain kiln, so as to insure the greatest possible heating of the material het'ore it is delivered to the main or clinkering turn-acc. 'The kilns C, C' are supported on roller hearings and may be rotated by mechanism c. SaidL auxiliary kilns are substantially parallel to one another and like the turnace A inclined upwardly, while their rear ends communicate with a chamber D leading to a stack (Z,-

which, if desired, may be also combined with a drier E in the manner fully set forth in niy reissued United States Patent No. 12,474, dated April 24, 1906, the present invention..

Under operating conditions alll threeuof the -kilnsiare turned hy their driving mechanisln and iinely powdered raw'material is fed into the upper or rear end of cachot the auxiliary kilns C and C through chutes' d by suitable means well known to the art. At the saine time any suitahle'fuel is supplied to the burner o at the front end of the main kiln and it will he seen that as the rotation of the kilns C and C is continued the raw material is fed through them and deposited upon the inclined apron from whence it tiows to and'through the spout b into the rear end of the mainkiln A. In the kilns and C the heat of the products of combustion causes chemical action resulting in the giving-.od of carbon-dioxid and other gases, Vwhile in the main kiln A the clinkering takes place; the dimensions of the apparatus 'being such that what is known as the point of clinkering iswithin this latter kiln. From the front end of this main kiln the clinker is discharged and subseand forming no partof quently treated thel manner customary in this art. Y

As is usual, air enters the kiln A with the fuel, and while the highest available temperature from said fuel Vis in this kiln a further supply of air is drawn or forced into theV hoed B through the openings b2, thereby `securing a supply of air at a point in the current of burning fuel intermediate the burner and the stac From the hood B the current of hot gases divides into two parts respectively passing through the kilns C and C from whence they pass to the stack chamber D and to either the stack d or the drier E. t

While I have shown two auxiliary kilns, 1t is obvious that-any desired number of auxi iliary kilns may be used in conjunction with said material-has been previously brought to a much higher temperature than. is possible when but a single long kiln is employed.

It is, of course, obvious that the speeds of rotation of the main and auxiliary kilns may be -independently regulated and that,

-for the reasons above noted, a much larger body of cement clinker be burned ina viven time with an apparatus constructe according to my invention than is possible with a single unit of the present type. It is further obvious that the fuel is utilized to" the fullest possible extent and in what is the most advantageous manner, since not only is it supplied with all the oxygen needed for' complete combustion by reason of the use,

In the combination ofa main rotary kiln,

in which the clinkeringiis accomplished, a plurality of auxiliary kilns in which carbon dioxid is driven ofi', said auxiliary kilns being placed back of the main kiln, means for supplying fuel to said main kiln, a casing built between the main and the auxiliary kilns, the rear end of the main kiln entering the lower portion of one side of the casing, and the forward ends of the auxiliary kilns entering the upper part ofthe opposite side of the casing, a stack communicating with the rear ends of the auxiliary kilns, and a trough in the casing for transferring material from the auxiliary kilns directly to the main kiln.

In testimony whereof, Ihave signed my name to this specification, in the presence of two subscribing witnesses.

v CHARLES A. MATCHAM. Witnesses:

GEO. W. Rocxwsm., WILLIAM J. THOMAS. 

